Page Comparison

• . Choose Geometry->Delete->Volumes and select the two volumes, to be able to delete some of its unwanted surfaces.

Note: verify that 'Also lower entities' of the delete menu is not set, otherwise its surfaces, lines and points will be deleted.

• . Choose Geometry->Delete->Surfaces and select the small surfaces inside the first pipe. Select Lower Entities in the contextual menu, to delete its dependencies also. Press ESC to conclude the process of selection.

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Surfaces to be deleted

Delete the rest of unwanted surfaces to left only the skin of a volume.

• . Use Geometry->Create->Volume->By contour and select all surfaces

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The volume of a T junction

• . From the Files menu, select Save to save the file. Enter a name for the file and click Save.